Fuel-economizer.



J. C. LANDEFELD.

FUEL ECONOMIZER.

APPLICATION HLED JULY 23.1914.

Patented Sept. 7, 1915.

' WITNESSES.

M wa INVEN '1'OR. J30 dj /mvzzaz Maw ATTORNEY.

COLUMBIA PLANOGRAFH 00., WASHINGTON n c gan, have invented a which forma part in the aiding of Combustion.

JOHN C. LANDEFELI), 0F DETROIT, MICHIGAN.

rUEL-noo'NoMIzEn.

Specification of Letters Patent.

Patented Sept. 7, 1915.

Application filed July 23, 1914. Serial No. 852,767.

To (ZZZ whom, it may concern Be it known that I, JOHN C. LANDEFELD, acitizen of the United States, residing at Detroit, county of Wayne,State of Michi certain new and useful Improvement in Fuel-Economizers,and declare the following exact description of the same, such asv willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings,

of this specification.

This invention relates to fuel economizers and smoke preventers and itsobject is a device for use in steam boiler furnaces or the like, inwhich steam jets are employed In many furnaces in which the steam jetsare directed into and through flame over the fuel body, cold air isintroduced directly into the furnace through the said ets, the effect ofwhich is detrimental tending'to reduce the-temperature of the furnaceand condense the steam prior to its entrance into the burn- 1ng gases.An object of this invention is means for introducing a current of heatedair into the steam jets whereby combustion is accelerated, producinga'rich oxygen gas and causing a more complete consumption of the fuel.Smoke is thus practically eliminated whereby the boiler tubes do notbecome incrusted with carbon and enabling a greater absorption ofheat-to of the tube and of the furnace.

v A structure by which these and other objects of the invention may beattained is hereinafter more fully described and claimed and shown inthe accompanying drawings in which Figure 1 is a vertical section of asteam boiler furnace embodying my invention showing the air flue insection in the preferred relation with other parts of the structure.Fig. 2 is a front elevation of the fur nace door showing the opening tothe air flue and general position of thesame relative to the steam jets.

Similar characters refer to similar parts throughout the drawings andspecification.

The drawings are somewhat diagrammatic showing a fire-box 1 providedwith a grate 2 for supporting the fuel, above which are the boiler tubes3 connected with the orthus increasing the efiiciency to be a full,clear, and

1 erably by bolting- '12 is positioned within subjected to the influencetake place through the walls dinary header 4:. The fire-box is linedwith the usual fire brick indicated at 5 and 6. Through the front Wall 7of the furnace extend steam conduitsvor jets 8, 8 etc, being greater orless in number depending upon the size of the furnace. ,Theseconduits 8terminate in a nozzle end asupply pipe 10, in this instance shown aspassing across the front of the furnace. These jets extend into thefurnace above the fire door 11. The door has a rectangular openingextending nearly the full length thereof and supported in any convenientmanner'upon the door, prefsubstantially U shaped air conduit 12, one endof which extends through the opening in thedoor and is provided with adamper 13 for regulating the flow of air therethrough. The opposite endof the conduit is formed with a slight curve adapted to direct the airinto the steam jets as shown in Fig. 1. The air conduit is preferablymade of sheet steel, as such material does not readily crack under theinfluence of high degrees of heat. As shown in Fig. 1 when the door llisclosed the said conduit the furnace and is ofthe heat therein and airentering through the conduit from the exterior of the fire-box is madeto travel in a path requiring such time interval that the air becomeshighly heated prior to contact with the steam jets and the furnacegases. By this arrangement the temperature of the steam is not loweredand oxygen is added in a manner to aid combustion. The temperature ofthe furnace will be maintained at a high point and as the burning of thefuel is substantially complete smoke. and accumulation of soot on theboiler tube is practically prevented.

The conduit 12 may be made of various shapes, the essentialcharacteristic being that air passing therethrough traverses a pathofsuflicient length to allow it to become heated prior to flowing intothe steam jets.

The device is adaptable for use in any furnace where steam jets areemployed, the form being determined by the position of the steam jetsand the space that may be utilized by the conduit.

Having thus briefly described my invention its utility and mode ofoperation, what I 9 set at an angle adapted todirect the steam into thefire. vThe jets are connected to or riveting thereto, is a I claim anddesire to secure by Letters Patent of the United States is-- 1. In afurnace, in combination with steam conduits adapted to deliver jets ofsteam directly into the fire at an angle, a substantially U shaped metalair conduit eX- tending into the fire box of such length that the airbecomes highly heated in passing therethrough and having a discharge endpositioned to direct the air through the jets in a manner to deflect thesteam over the area of combustion.

2. In a furnace, the combination with steam conduits adapted to directjets of steam at an angle into the fire, of a sheet metal air conduitextending into the firebox and adapted to direct air flowingtherethrough into the jets at an angle to the direction of fiow ofsteam, said conduit being suspended on the door of the fire box.

3. In a furnace, the combination with steam conduits adapted to directjets of steam at an angle into the fire, of a U shaped sheet-metal airconduit secured to the furnace door, and extending into the fire-box,

Copies of this patent may be obtained for and having a curved dischargeend adapted to direct heated air over the area of combustion through thesaid jets.

4. In a furnace, in combination with steam conduits adapted to deliversteam through a plurality of jets directly into the fire at an angle, asubstantially U shaped metal air conduit secured to the inside of thefire door and extending outwardly therethrough providing an inlet, theoutlet end within the fire box being curved to direct the air throughthe jets in a manner to distribute the steam over the area ofcombustion, and a damper for controlling said in let, the length of theconduit being such that air passing therethrough becomes highly heatedprior to its liberation into the fire-box.

In testimony whereof, I sign this specifi cation in the presence of twowitnesses.

CHARLES E. VVIsNEn, M. S. DONOVAN.

five cents each,'by addressing the Commissioner of Patents,

Washington, D. G.

